The condensate sump (or drain) KJ should be used where condensate is formed. It is used usually to remove the condensate that is caused by fumes from the kitchen hood or when you are ventilating bathroom. Condensate is created everywhere where is a large thermal gradient. In this case isolating the ventilation duct is ineffective as the cold air goes through the ventilation system and condenses on the duct walls.
If you put this sump in your ventilation system and connect it with other plastic pipes with diameters of 104 (KJ 104) or 125 mm (KJ 125) it will collect the condensate inside its collector and then you are able to drain it with the supplied 9 mm in diameter and 0,5 long hose.
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